Cast molding material for plastic lens and process for the production of plastic lens
US6187888A · kind A · utility
4Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1999 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Sep 22, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/808
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A cast-molding material for a plastic lens which is almost free from causing defective dyeing when dyed, and a process for producing plastic lenses almost free from causing defective dyeing, the cast-molding material containing, as essential components, a combination of (A) diethylene glycol bisallylcarbonate or a mixture of diethylene glycol bisallylcarbonate and a monomer copolymerizable therewith, with (B) a polyether-modified silicone compound, and the process comprising cast-molding the above cast-molding material in a mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.